pub fn odd_fibnacci_sum(threshold: u32) -> u32 {
    if threshold == 0 || threshold == 1 {
        return 0;
    }

    let mut small_addend: u32 = 1;
    let mut big_addend: u32 = 1;

    let mut sum = small_addend + big_addend;

    while big_addend < threshold {
        let big_addend_bak = big_addend;
        big_addend += small_addend;
        small_addend = big_addend_bak;

        println!("big_addend ===> {}", big_addend);

        if big_addend >= threshold {
            break;
        } else if big_addend % 2 != 0 {
            sum += big_addend;
            println!("sum={}", sum);
        }
    }

    sum
}
